package operation;

import book.Book;
import book.BookList;

import java.util.Scanner;

/**
 * @Author 12629
 * @Description：
 */
public class DelOperation implements IOPeration{
    @Override
    public void work(BookList bookList) {
        System.out.println("删除图书....");
        System.out.println("请输入你要删除的图书: ");
        Scanner scanner = new Scanner(System.in);
        String name = scanner.nextLine();
        //遍历 书架  是否存在这样的 书
        int index = -1;
        int currentSize = bookList.getUsedSize();
        int i = 0;
        for (; i < currentSize; i++) {
            Book book = bookList.getBook(i);
            if(book.getName().equals(name)) {
               index = i;
               break;
            }
        }
        if(i >= currentSize) {
            System.out.println("没有你要删除的书....");
            return;
        }
        for (int j = index; j < currentSize-1; j++) {
            //bookList[j] = bookList[j+1];
            Book book = bookList.getBook(j+1);
            bookList.setBook(j,book);
        }
        bookList.setUsedSize(currentSize-1);
        System.out.println("删除书籍成功....");
    }
}
